The Underground Great Wall of China refers to a vast network of tunnels and underground facilities constructed across China, primarily during the Cold War era. This system was designed to house and protect intercontinental ballistic missiles (ICBMs) and their launch systems, ensuring national security against potential nuclear threats. The network spans thousands of miles, integrating with existing infrastructure to provide secure transportation and deployment routes for nuclear weapons.
Geographically, these facilities are distributed throughout northern China, leveraging mountainous and remote regions for concealment. While the exact locations of many sites remain classified, the existence of this system is well-documented in historical records and military analyses. Today, parts of the network may be accessible for research or tourism, though security measures often restrict public access.
The architectural design emphasizes durability and camouflage, with reinforced concrete structures and hidden entrances to blend with natural landscapes.